package cn.edu.live.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class EncryptUtil {

	/**
	 * MD5
	 * 
	 * @param plainText
	 * @return
	 */
	public static String MD5(String plainText) {
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			md.update(plainText.getBytes());
			byte b[] = md.digest();

			int i;

			StringBuffer buf = new StringBuffer("");
			for (int offset = 0; offset < b.length; offset++) {
				i = b[offset];
				if (i < 0)
					i += 256;
				if (i < 16)
					buf.append("0");
				buf.append(Integer.toHexString(i));
			}
			// 32位加密
			return buf.toString();
			// 16位的加密
			// return buf.toString().substring(8, 24);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
			return null;
		}

	}

	public static void main(String[] args) {
		String s = "activityCategory012activityNamejava测试直播间codeRateTypes13,16endTimeTS1489498592602liveNum1methodlecloud.cloudlive.activity.createplayMode1startTimeTS1489494994602timestamp1489494992602userid894283ver4.160e01cde10efea61fa8e9429ac8cdb46";
		System.out.println(MD5(s));
	}

}
